Sci. Signal., 23 September 2008
Alzheimer's Disease Activity Around Plaques
Stella M. Hurtley
Science, AAAS, Cambridge CB2 1LQ, UK
Identifying the underlying cellular mechanisms of cortical dysfunction in amyloid-depositing mammalian brains should hopefully generate leads in the search for effective treatments for Alzheimers disease. Busche et al. used in vivo two-photon calcium imaging of cortical networks to monitor Ca2+ signaling of individual layer 2/3 cortical neurons in a mouse model of Alzheimers disease. Fifty percent of cortical neurons in diseased mice exhibited impaired functional properties. A class of "hyperactive" neurons was identified whose existence was not predicted from previous in situ or functional imaging data. The hyperactive neurons were located exclusively in peri-plaque regions, and their presence correlated with impairment of cognitive behavior. This synaptically driven hyperactivity of peri-plaque regions may underlie the increased incidence of epileptic seizures in Alzheimers disease patients.
M. A. Busche, G. Eichhoff, H. Adelsberger, D. Abramowski, K.-H. Wiederhold, C. Haass, M. Staufenbiel, A. Konnerth, O. Garaschuk, Clusters of hyperactive neurons near amyloid plaques in a mouse model of Alzheimers disease. Science 321 1686-1689 (2008). [Abstract] [Full Text]
Citation: S. M. Hurtley, Activity Around Plaques. Sci. Signal. 1, ec331 (2008).
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